Stewart & Stevenson is a company that operates as a designer, manufacturer, and provider of specialized equipment and aftermarket parts and services for the oil and gas industries. Its range of products covers hydraulic fracturing, well stimulation, workover, intervention, and drilling operations. Additionally, the company provides support for customers with rental equipment that includes generator sets, air compressors, railcar movers, and material handling equipment. Stewart & Stevenson serves the on-highway, power generation, construction and industrial, marine, oil and gas, and energy storage markets.